/Engine/Plugins/Experimental/FullBodyIK/Source/FullBodyIK/Public/JacobianSolver.h
Initialize Solver - allows users to modify data before running the base solver - Check Below
virtual void InitializeSolver ( [TArray](API\Runtime\Core\Containers\TArray)< [FFBIKLinkData](API\Plugins\FullBodyIK\FFBIKLinkData) > & InOutLinkData, [TMap](API\Runtime\Core\Containers\TMap)< int32, [FFBIKEffectorTarget](API\Plugins\FullBodyIK\FFBIKEffectorTarget) > & InOutEndEffectors ) const